Lang Tengah Malaysia

Anybody been to lang Tengah island in Malaysia?

I'm considering going in end April/beg May for about 4 days, 3 nights with my wife and 20 month old toddler. I scuba dive.

1 - When I go diving, is there anything my wife and son can do on the island ? Is the beach nice enough for t hem to hang out ?

2 - Any recommendations on where to stay. I hear it's a new "not so developed" island.

3 - Any recommendations on dive shops I can go diving with ? I don't dive that regularly so looking for shops and dive masters who a rreliable/professionale.

Thanks

Eric